2021 ICD-10-CM Diagnosis Code A50

Congenital syphilis

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • A50 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM A50 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of A50 - other international versions of ICD-10 A50 may differ.
The following code(s) above A50 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A50:
  • A00-B99
    2021 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A50-A64
    2021 ICD-10-CM Range A50-A64

    Infections with a predominantly sexual mode of transmission

    Type 1 Excludes
    • human immunodeficiency virus [HIV] disease (B20)
    • nonspecific and nongonococcal urethritis (N34.1)
    • Reiter's disease (M02.3-)
    Infections with a predominantly sexual mode of transmission
Clinical Information
  • A life-threatening bacterial infection of the newborn caused by treponema pallidum. It is transmitted to the infant from a mother with syphilis through the placenta during pregnancy. Signs and symptoms include irritability, fever, failure to thrive, saddle nose, cutaneous rash, and pneumonia.
  • Syphilis acquired in utero and manifested by any of several characteristic tooth (hutchinson's teeth) or bone malformations and by active mucocutaneous syphilis at birth or shortly thereafter. Ocular and neurologic changes may also occur.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to A50:
  • Type 2 Excludes: P37
    ICD-10-CM Diagnosis Code P37

    Other congenital infectious and parasitic diseases

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • congenital syphilis (A50.-)
    • infectious neonatal diarrhea (A00-A09)
    • necrotizing enterocolitis in newborn (P77.-)
    • noninfectious neonatal diarrhea (P78.3)
    • ophthalmia neonatorum due to gonococcus (A54.31)
    • tetanus neonatorum (A33)
ICD-10-CM Codes Adjacent To A50
A48.8 Other specified bacterial diseases
A49 Bacterial infection of unspecified site
A49.0 Staphylococcal infection, unspecified site
A49.01 Methicillin susceptible Staphylococcus aureus infection, unspecified site
A49.02 Methicillin resistant Staphylococcus aureus infection, unspecified site
A49.1 Streptococcal infection, unspecified site
A49.2 Hemophilus influenzae infection, unspecified site
A49.3 Mycoplasma infection, unspecified site
A49.8 Other bacterial infections of unspecified site
A49.9 Bacterial infection, unspecified
A50 Congenital syphilis
A50.0 Early congenital syphilis, symptomatic
A50.01 Early congenital syphilitic oculopathy
A50.02 Early congenital syphilitic osteochondropathy
A50.03 Early congenital syphilitic pharyngitis
A50.04 Early congenital syphilitic pneumonia
A50.05 Early congenital syphilitic rhinitis
A50.06 Early cutaneous congenital syphilis
A50.07 Early mucocutaneous congenital syphilis
A50.08 Early visceral congenital syphilis
A50.09 Other early congenital syphilis, symptomatic

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.